Chewtobacca: Yep, higher quality (no extra MPEG2 artefacts) and more importantly I have IVTC'd the films so they play at 23.976 fps, so no horrible 3:2 pulldown anymore!
I'll try and make my x264 mkvs available once they're done. I created versions last year using v4 of g-force's scripts, but will be re-doing them with his latest scripts (including RotJ when he releases that). I also hope to collect all of the available mixes for each film (in FLAC for the 2.0 mixes and AC3 for the 5.1 mixes). I'll post when they're ready, could be a few months away yet though.